•A single Ti-RANT 45™ series silencer can be used on a variety of host firearms w/different barrel threads by quickly & easily swapping out the threaded A.S.A.P. piston in the rear of the silencer •All Ti-RANT™ series pistons feature heat treated stainless steel construction, a matte bead blasted finish, & engraving to identify the thread diameter, pitch, and direction of rotation for installation •Also a Ti-RANT 45 piston threaded in 1/2-28 or 13.5x1LH to use the Ti-RANT 45 on your 9mm